add output, no default backend, will load any available backend in th…

…is order, rmagick > oily_png > chunky_png > mini_magick.

lib/active_assets/active_sprites/configurable.rb

@@ -7,7 +7,6 @@ module Configurable
 
       included do
         config_accessor :sprite_backend
-        self.sprite_backend = :rmagick if sprite_backend.nil?
       end
     end
   end

lib/active_assets/active_sprites/runners/abstract_runner.rb

@@ -27,27 +27,63 @@ def initialize(railtie, sprites)
         end
       end
 
-      def generate!(debug = ENV['DEBUG'])
+      def generate!
+        verbose = ENV['VERBOSE'] != 'false' || ENV['DEBUG']
+
+        if verbose
+          t = Time.now
+          $stdout << "#{t}: Active Sprites: \"I'm string my run using #{runner_name}.\"\n" 
+          $stdout << "\nSprites to create:\n\"#{@sprites.map(&:path).join('", "')}\"\n"
+        end
+
         @sprites.each do |sprite|
           next if sprite.sprite_pieces.empty?
+
+          if verbose
+            t_sprite = Time.now
+            $stdout << "\n=================================================\n"
+            $stdout << "Starting Sprite, #{sprite.path}\n"
+          end
+
           sprite_path = sanitize_asset_path(context.image_path(sprite.path))
-          p "Sprite Path: #{sprite_path}" if debug
           sprite_stylesheet_path = sanitize_asset_path(context.stylesheet_path(sprite.stylesheet_path))
-          p "Sprite Stylesheet Path: #{sprite_stylesheet_path}" if debug
 
           orientation = sprite.orientation.to_s
           sprite_pieces = sprite.sprite_pieces
 
           begin
+            $stdout << "Gathering sprite details..." if verbose
             image_list, width, height = set_sprite_details_and_return_image_list(sprite, sprite_path, sprite_pieces, orientation)
+            $stdout << "done.\n" if verbose
+
+            if ENV['DEBUG']
+              $stdout << "|\tpath\t|\tselectors\t|\tx\t|\ty\t|\twidth\t|\theight\t|\n"
+              $stdout << "#{sprite_pieces.map(&:to_s).join("\n")}\n"
+            end
+
             stylesheet = SpriteStylesheet.new(sprite_pieces)
-            stylesheet.write File.join(@railtie.config.paths.public.to_a.first, sprite_stylesheet_path)
-            create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height, orientation)
-            write File.join(@railtie.config.paths.public.to_a.first, sprite_path), sprite.quality
+            stylesheet_file_path = File.join(@railtie.config.paths.public.to_a.first, sprite_stylesheet_path)
+            $stdout << "Writing stylesheet to #{stylesheet_file_path} ... " if verbose
+            stylesheet.write stylesheet_file_path
+            $stdout << "done.\n" if verbose
+
+            $stdout << "Beginning sprite generation using #{runner_name.humanize}.\n" if verbose
+            create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height, orientation, verbose)
+            $stdout << "Success!\n" if verbose
+
+            sprite_file_path = File.join(@railtie.config.paths.public.to_a.first, sprite_path)
+            $stdout << "Writing sprite to #{sprite_file_path} ... " if verbose
+            write sprite_file_path, sprite.quality
+            $stdout << "done.\n" if verbose
+
+            $stdout << "Finished #{sprite.path} in #{Time.now - t_sprite} seconds.\n" if verbose
+            $stdout << "=================================================\n\n" if verbose
           ensure
             finish
           end
         end
+
+        $stdout << "#{Time.now}: ActiveSprites \"I finished my run in #{Time.now - t} seconds.\"\n" if verbose
       end
 
       private

lib/active_assets/active_sprites/runners/chunky_png_runner.rb

@@ -30,12 +30,14 @@ def set_sprite_details_and_return_image_list(sprite, sprite_path, sprite_pieces,
           [image_list, width, height]
         end
 
-        def create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height, orientation)
+        def create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height, orientation, verbose)
           @sprite = ChunkyPNG::Image.new(width, height, ChunkyPNG::Color::TRANSPARENT)
 
           image_list.each_with_index do |image, i|
             @sprite.replace(image, sprite_pieces[i].details.x, sprite_pieces[i].details.y)
+            $stdout << '.' if verbose
           end
+          $stdout << "\n" if verbose
         end
 
         def write(path, quality = nil)
@@ -46,6 +48,15 @@ def write(path, quality = nil)
         def finish
           @sprite = nil
         end
+
+        def runner_name
+          begin
+            require 'oily_png'
+            'oily_png'
+          rescue LoadError
+            'chunky_png'
+          end
+        end
     end
   end
 end

lib/active_assets/active_sprites/runners/mini_magick_runner.rb

@@ -30,7 +30,7 @@ def set_sprite_details_and_return_image_list(sprite, sprite_path, sprite_pieces,
           [image_list]
         end
 
-        def create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height, orientation)
+        def create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height, orientation, verbose)
           begin
             tempfile = ImageTempfile.new(File.extname(sprite_path)[1..-1])
             tempfile.binmode
@@ -50,6 +50,8 @@ def create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height,
           args << tempfile.path
 
           MiniMagick::Image.new(image_list.first.path).run_command('montage', *args)
+          image_list.size.times { $stdout << '.' } if verbose
+          $stdout << "\n" if verbose
           @sprite = MiniMagick::Image.open(tempfile.path)
         end
 
@@ -63,6 +65,10 @@ def finish
           @sprite = nil
         end
 
+        def runner_name
+          'mini_magick'
+        end
+
     end
   end
 end

lib/active_assets/active_sprites/runners/rmagick_runner.rb

@@ -30,13 +30,16 @@ def set_sprite_details_and_return_image_list(sprite, sprite_path, sprite_pieces,
           [image_list]
         end
 
-        def create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height, orientation)
+        def create_sprite(sprite, sprite_path, sprite_pieces, image_list, width, height, orientation, verbose)
           @sprite = image_list.montage do
             self.tile = orientation == Sprite::Orientation::VERTICAL ? "1x#{sprite_pieces.size}" : "#{sprite_pieces.size}x1"
             self.geometry = "+0+0"
             self.background_color = 'transparent'
             self.matte_color = sprite.matte_color || '#bdbdbd'
           end
+
+          image_list.size.times { $stdout << '.' } if verbose
+          $stdout << "\n" if verbose
         end
 
         def write(path, quality = nil)
@@ -53,6 +56,11 @@ def finish
           end
           @sprite = DEFAULT_SPRITE
         end
+
+        def runner_name
+          'rmagick'
+        end
+
     end
   end
 end

lib/active_assets/active_sprites/sprite_piece.rb

@@ -32,7 +32,7 @@ def configure(mapping, options = {}, &blk)
         self
       end
 
-      def to_s
+      def to_css
         return '' if details.nil?
         <<-CSS
 #{css_selector}
@@ -45,6 +45,10 @@ def to_s
         CSS
       end
 
+      def to_s
+        "|\t#{path}\t|\t#{css_selector}\t|\t#{details.x}\t|\t#{details.y}\t|\t#{details.width}\t|\t#{details.height}\t|\n"
+      end
+
       GEOMETRY_PROPS.each do |prop|
         eval <<-METH
           def #{prop}(*args)

lib/active_assets/active_sprites/sprite_stylesheet.rb

@@ -8,16 +8,15 @@ def initialize(sprite_pieces)
       end
 
       def write(path)
-        to_s!
         FileUtils.mkdir_p(File.dirname(path))
         File.open(path, 'w+') do |f|
-          f.write @as_string
+          f.write to_s
         end
       end
 
       private
-        def to_s!
-          @as_string ||= @sprite_pieces.map(&:to_s).join("\n")
+        def to_s
+          @as_string ||= @sprite_pieces.map(&:to_css).join("\n")
         end
     end
   end

lib/active_assets/active_sprites/sprites.rb

@@ -66,9 +66,31 @@ def generate!(railtie = Rails.application)
               require 'chunky_png'
               ChunkyPngRunner.new(railtie @sprites).generate!
             end
+          else
+            begin
+              require 'rmagick'
+              RmagickRunner.new(railtie, @sprites).generate!
+            rescue LoadError
+              begin
+                begin
+                  require 'oily_png'
+                  ChunkyPngRunner.new(railtie, @sprites).generate!
+                rescue LoadError
+                  require 'chunky_png'
+                  ChunkyPngRunner.new(railtie, @sprites).generate!
+                end
+              rescue LoadError
+                require 'mini_magick'
+                MiniMagickRunner.new(railtie, @sprites).generate!
+              end
+            end
           end
-        rescue LoadError
-          p "#{sprite_backend}, sprite backend was not found. Either install #{sprite_backend}, or configure config.active_sprites.sprite_backend to your installed backend in application.rb. Options are :rmagick, :chunky_png, and :mini_magick"
+        rescue LoadError => e
+          msg = ''
+          msg << "You have not specified any sprite runtime in your configuration.  We tried to load all supported runtimes, but failed to load any." if !sprite_backend
+          msg << "Your requested backend, #{sprite_backend}, was not found." if sprite_backend
+          msg << " Supported sprite backends include :rmagick, :chunky_png, and :mini_magick.  To use oily_png, install oily_png and configure with :chunky_png.\n"
+          $stdout << msg
         end
       end
     end

test/helper.rb

@@ -1,4 +1,5 @@
 ENV['RAILS_ENV'] ||= 'test'
+ENV['VERBOSE'] = 'false'
 
 require 'rubygems'
 require 'test/unit'